package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Slf4j
@Service
public class SetmealImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /*
     * 新增套餐
     * */
    @Transactional
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //添加套餐
        setmealMapper.insert(setmeal);

        //添加关联的菜品
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        for (SetmealDish setmealDish : setmealDishes) {
            setmealDish.setSetmealId(setmeal.getId());
        }
        setmealDishMapper.insert(setmealDishes);
    }

    /*
    * 套餐分页查询
    * */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> voPage = setmealMapper.pageQuery(setmealPageQueryDTO);

        return new PageResult(voPage.getTotal(),voPage.getResult());
    }

    /*
    * 批量删除套餐及其关联菜品
    * */
    @Transactional
    public void deleteWithDish(List<Long> ids) {
        //查看是否为起售状态
        for (Long id : ids) {
            Setmeal setmeal =  setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                //起售中的套餐不能删除
                throw  new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        //删除套餐
        setmealMapper.deletes(ids);

        //删除关联菜品
        setmealDishMapper.deletes(ids);
    }

    /*
    * 根据id查询套餐
    * */
    public SetmealVO getByidWhitDish(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);;
        List<SetmealDish> setmealDishList = setmealDishMapper.getById(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishList);

        return setmealVO;
    }

    /*
    * 修改套餐数据
    * */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //修改套餐
        setmealMapper.update(setmeal);

        //获取套餐id
        long setmealId = setmealDTO.getId();

        //删除套餐关联的菜品
        setmealDishMapper.delete(setmealId);

        //获取相关的菜品
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        for (SetmealDish setmealDish : setmealDishes) {
            setmealDish.setSetmealId(setmealId);
            //判断新添加是否包含停售菜品
            Dish dish = dishMapper.getById(setmealDish.getDishId());
            if(dish.getStatus() == StatusConstant.DISABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_STOP_ON_UPDATE);
            }
        }



        //添加套餐关联的菜品
        setmealDishMapper.insert(setmealDishes);

    }

    /*
    * 启用和禁用套餐
    * */
    @Transactional
    public void startOrStop(Integer status, Long id) {
        //开启起售时，判断菜品中是否有停售商品，如有停售商品，无法启动
        if(status == StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                for (Dish dish : dishList) {
                    if(dish.getStatus() == StatusConstant.DISABLE){
                        throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                }
            }
        }

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
